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Evaluate \(\sin \left(x-90^{\circ}\right)\)
in Mathematics by Platinum (163,814 points) | 79 views

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\(\sin \left(x-90^{\circ}\right)\)

\(=\sin (x) \cdot \cos \left(90^{\circ}\right)-\cos (x) \cdot \sin \left(90^{\circ}\right)\)
\(=\sin (x) \cdot 0-\cos (x)(1)\)
\(=-\cos (x)\)
by Platinum (163,814 points)

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